Remove tons of OILPAN.

sky/engine/core/css/MediaQueryExp.h

 /*
  * CSS Media Query
  *
  * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 78 matching lines @@
     bool operator==(const MediaQueryExp& other) const;
 
     bool isViewportDependent() const;
 
     String serialize() const;
 
     PassOwnPtr<MediaQueryExp> copy() const { return adoptPtr(new MediaQueryExp(*this)); }
 
     MediaQueryExp(const MediaQueryExp& other);
 
-    void trace(Visitor* visitor) { }
-
 private:
     MediaQueryExp(const String&, const MediaQueryExpValue&);
 
     String m_mediaFeature;
     MediaQueryExpValue m_expValue;
 };
 
 } // namespace
 
 #endif